From Rome Summit 1991 to Washington Summit 1999, the alliance had a lot of policy readjustment. During the time, NATO operated some military action at Balkan Region, which became the realistic reason of the issue of the New Strategic Concept.

• 从1991年的罗马峰会到1999年的华盛顿峰会,北约适时进行了一系列的战略调整,加上此期在巴尔干的几次实验,这些都促成了新战略概念的最终出台。